Fuel injection? Open or Closed loop?

Tom keedle · 07-30-2012, 05:17 AM

as i read all this i'm reminded of some classes/training i've took over the years......when you go WFO, oem stuff IS in open loop.

Ed Wright · 07-30-2012, 08:13 AM

Quote:

Originally Posted by Tom keedle

as i read all this i'm reminded of some classes/training i've took over the years......when you go WFO, oem stuff IS in open loop.

You are absolutely correct Tom. P.E. (Power Enrichment) mode is Open Loop. Closed loop target air/ fuel ratio is always 14.7-1 unless they have a Lean Cruise Mode. Then usually over 15-1 or leaner. Those are normally "Export" calibrations, as the cats used now are not efficient that lean. Most factory calibrations are actually overly rich in P.E. mode. Richer than we run our cars. Most GM calibrations are closer to 12-1 from the factory.

View Poll Results: Fuel injection? Do you run in open loop or closed loop
Open Loop	80	65.04%
Closed Loop	43	34.96%
Voters: 123. You may not vote on this poll

07-30-2012, 05:17 AM	#1
Tom keedle Senior Member Join Date: Dec 2008 Location: Berthoud, Coloraduh Posts: 695 Likes: 13 Liked 8 Times in 7 Posts	Re: Fuel injection? Open or Closed loop? as i read all this i'm reminded of some classes/training i've took over the years......when you go WFO, oem stuff IS in open loop. __________________ without losers,winning means nothing.